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CVE-2026-66788— Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Lighthouse是美国Google公司的一款网页质量审计与性能评测工具。 Google Lighthouse存在权限许可和访问控制问题漏洞，该漏洞源于资源注入的目标命名空间由攻击者控制的broker对象上的标签或注解派生，远程攻击者通过破坏spoke cluster，可能向对等集群任意命名空间注入未经授权的EndpointSlices和ServiceImports，导致权限提升或系统被破坏。

CVSS 3.7 · Low EPSS 0.45% · P37

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023916< * unaffected
1788023940< * unaffected
1788105072< * unaffected
1788073481< * unaffected
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I. Basic Information for CVE-2026-66788

Vulnerability Information
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Vulnerability Title
Lighthouse: dockerfile build stages use end-of-life fedora 40 referenced by mutable tag
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Lighthouse. A remote attacker, by compromising a spoke cluster, can exploit a vulnerability where the destination namespace for resource injection is derived from an attacker-controlled label or annotation on the broker object. This allows the attacker to inject unauthorized EndpointSlices and ServiceImports into any namespace on peer clusters, including critical system namespaces like kube-system and openshift-*. This could lead to privilege escalation or other forms of system compromise within the cluster.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用未维护的第三方组件
Source: CVE Program / CVE List V5
Vulnerability Title
Google Lighthouse 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Lighthouse是美国Google公司的一款网页质量审计与性能评测工具。 Google Lighthouse存在权限许可和访问控制问题漏洞，该漏洞源于资源注入的目标命名空间由攻击者控制的broker对象上的标签或注解派生，远程攻击者通过破坏spoke cluster，可能向对等集群任意命名空间注入未经授权的EndpointSlices和ServiceImports，导致权限提升或系统被破坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023916 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788023940 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788105072 ~ * cpe:/a:redhat:acm:2.17::el9
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.17 1788073481 ~ * cpe:/a:redhat:acm:2.17::el9

II. Public POCs for CVE-2026-66788

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III. Intelligence Information for CVE-2026-66788

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Vendor Advisories for CVE-2026-66788 (3)

Same Patch Batch · Red Hat · 2026-08-20 · 15 CVEs total

CVE-2026-67567 9.9 CRITICAL Multicloud-operators-subscription: multicloud-operators-subscription: helmrelease chart ap
CVE-2026-11861 9.6 CRITICAL Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relations
CVE-2026-13097 8.7 HIGH Ipa: privilege escalation via krbcanonicalname manipulation due to realm-unaware uniquenes
CVE-2026-77176 8.1 HIGH Kata-containers: insufficient validation of createcontainer mount and storage rules in gen
CVE-2026-18917 7.8 HIGH Libvirt: integer overflow in nodegetfreepages rpc handler leading to heap buffer overflow
CVE-2026-73137 7.7 HIGH Multicloud-operators-subscription: multicloud-operators-subscription: cross-namespace secr
CVE-2026-73197 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/migration/migration.py` via unbounded request b
CVE-2026-73198 7.5 HIGH Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read
CVE-2026-19611 7.4 HIGH Wildfly-elytron: org.wildfly.security/wildfly-elytron-password-impl: wildfly-elytron: pass
CVE-2026-73199 6.5 MEDIUM Ipa: freeipa: null pointer dereference in `ipa-enrollment` extended operation (`join_oid`)
CVE-2026-66787 5.4 MEDIUM Lighthouse: go pprof profiling endpoint enabled unconditionally on lighthouse-agent :8082
CVE-2026-77014 5.3 MEDIUM Libsoup: libsoup: integer truncation in sort_ranges() comparator causes silent omission of
CVE-2026-73196 4.3 MEDIUM Ipa: freeipa: authenticated dos in `otptoken-add` via unbounded otp key decoding/re-encodi
CVE-2026-66785 2.5 LOW Submariner: ipsec psk secrets file created with default world-readable permissions

IV. Related Vulnerabilities

Same product: Red Hat Advanced Cluster Management for Kubernetes 2.17
Same vendor: Red Hat
Same weakness: CWE-1104

V. Comments for CVE-2026-66788

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